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Add regression test
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‎tests/baselines/reference/invariantGenericErrorElaboration.errors.txt

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tests/cases/compiler/invariantGenericErrorElaboration.ts(3,7): error TS2322: Type 'Num' is not assignable to type 'Runtype<any>'.
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Types of property 'constraint' are incompatible.
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Type 'Constraint<Num>' is not assignable to type 'Constraint<Runtype<any>>'.
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Types of property 'constraint' are incompatible.
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Type 'Constraint<Constraint<Num>>' is not assignable to type 'Constraint<Constraint<Runtype<any>>>'.
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Types of property 'constraint' are incompatible.
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Type 'Constraint<Constraint<Constraint<Num>>>' is not assignable to type 'Constraint<Constraint<Constraint<Runtype<any>>>>'.
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Type 'Constraint<Constraint<Runtype<any>>>' is not assignable to type 'Constraint<Constraint<Num>>'.
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Types of property 'underlying' are incompatible.
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Type 'Constraint<Runtype<any>>' is not assignable to type 'Constraint<Num>'.
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tests/cases/compiler/invariantGenericErrorElaboration.ts(4,17): error TS2345: Argument of type '{ foo: Num; }' is not assignable to parameter of type '{ [_: string]: Runtype<any>; }'.
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Property 'foo' is incompatible with index signature.
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Type 'Num' is not assignable to type 'Runtype<any>'.
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==== tests/cases/compiler/invariantGenericErrorElaboration.ts (2 errors) ====
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// Repro from #19746
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const wat: Runtype<any> = Num;
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~~~
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!!! error TS2322: Type 'Num' is not assignable to type 'Runtype<any>'.
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!!! error TS2322: Types of property 'constraint' are incompatible.
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!!! error TS2322: Type 'Constraint<Num>' is not assignable to type 'Constraint<Runtype<any>>'.
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!!! error TS2322: Types of property 'constraint' are incompatible.
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!!! error TS2322: Type 'Constraint<Constraint<Num>>' is not assignable to type 'Constraint<Constraint<Runtype<any>>>'.
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!!! error TS2322: Types of property 'constraint' are incompatible.
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!!! error TS2322: Type 'Constraint<Constraint<Constraint<Num>>>' is not assignable to type 'Constraint<Constraint<Constraint<Runtype<any>>>>'.
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!!! error TS2322: Type 'Constraint<Constraint<Runtype<any>>>' is not assignable to type 'Constraint<Constraint<Num>>'.
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!!! error TS2322: Types of property 'underlying' are incompatible.
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!!! error TS2322: Type 'Constraint<Runtype<any>>' is not assignable to type 'Constraint<Num>'.
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const Foo = Obj({ foo: Num })
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~~~~~~~~~~~~
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!!! error TS2345: Argument of type '{ foo: Num; }' is not assignable to parameter of type '{ [_: string]: Runtype<any>; }'.
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!!! error TS2345: Property 'foo' is incompatible with index signature.
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!!! error TS2345: Type 'Num' is not assignable to type 'Runtype<any>'.
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interface Runtype<A> {
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constraint: Constraint<this>
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witness: A
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}
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interface Num extends Runtype<number> {
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tag: 'number'
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}
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declare const Num: Num
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interface Obj<O extends { [_ in string]: Runtype<any> }> extends Runtype<{[K in keyof O]: O[K]['witness'] }> {}
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declare function Obj<O extends { [_: string]: Runtype<any> }>(fields: O): Obj<O>;
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interface Constraint<A extends Runtype<any>> extends Runtype<A['witness']> {
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underlying: A,
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check: (x: A['witness']) => void,
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}
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‎tests/baselines/reference/invariantGenericErrorElaboration.js

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//// [invariantGenericErrorElaboration.ts]
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// Repro from #19746
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const wat: Runtype<any> = Num;
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const Foo = Obj({ foo: Num })
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interface Runtype<A> {
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constraint: Constraint<this>
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witness: A
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}
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interface Num extends Runtype<number> {
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tag: 'number'
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}
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declare const Num: Num
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interface Obj<O extends { [_ in string]: Runtype<any> }> extends Runtype<{[K in keyof O]: O[K]['witness'] }> {}
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declare function Obj<O extends { [_: string]: Runtype<any> }>(fields: O): Obj<O>;
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interface Constraint<A extends Runtype<any>> extends Runtype<A['witness']> {
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underlying: A,
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check: (x: A['witness']) => void,
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}
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//// [invariantGenericErrorElaboration.js]
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"use strict";
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// Repro from #19746
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var wat = Num;
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var Foo = Obj({ foo: Num });

‎tests/baselines/reference/invariantGenericErrorElaboration.symbols

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=== tests/cases/compiler/invariantGenericErrorElaboration.ts ===
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// Repro from #19746
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const wat: Runtype<any> = Num;
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>wat : Symbol(wat, Decl(invariantGenericErrorElaboration.ts, 2, 5))
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>Runtype : Symbol(Runtype, Decl(invariantGenericErrorElaboration.ts, 3, 29))
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>Num : Symbol(Num, Decl(invariantGenericErrorElaboration.ts, 8, 1), Decl(invariantGenericErrorElaboration.ts, 13, 13))
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const Foo = Obj({ foo: Num })
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>Foo : Symbol(Foo, Decl(invariantGenericErrorElaboration.ts, 3, 5))
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>Obj : Symbol(Obj, Decl(invariantGenericErrorElaboration.ts, 13, 22), Decl(invariantGenericErrorElaboration.ts, 15, 111))
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>foo : Symbol(foo, Decl(invariantGenericErrorElaboration.ts, 3, 17))
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>Num : Symbol(Num, Decl(invariantGenericErrorElaboration.ts, 8, 1), Decl(invariantGenericErrorElaboration.ts, 13, 13))
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interface Runtype<A> {
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>Runtype : Symbol(Runtype, Decl(invariantGenericErrorElaboration.ts, 3, 29))
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>A : Symbol(A, Decl(invariantGenericErrorElaboration.ts, 5, 18))
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constraint: Constraint<this>
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>constraint : Symbol(Runtype.constraint, Decl(invariantGenericErrorElaboration.ts, 5, 22))
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>Constraint : Symbol(Constraint, Decl(invariantGenericErrorElaboration.ts, 16, 81))
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witness: A
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>witness : Symbol(Runtype.witness, Decl(invariantGenericErrorElaboration.ts, 6, 30))
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>A : Symbol(A, Decl(invariantGenericErrorElaboration.ts, 5, 18))
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}
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interface Num extends Runtype<number> {
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>Num : Symbol(Num, Decl(invariantGenericErrorElaboration.ts, 8, 1), Decl(invariantGenericErrorElaboration.ts, 13, 13))
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>Runtype : Symbol(Runtype, Decl(invariantGenericErrorElaboration.ts, 3, 29))
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tag: 'number'
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>tag : Symbol(Num.tag, Decl(invariantGenericErrorElaboration.ts, 10, 39))
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}
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declare const Num: Num
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>Num : Symbol(Num, Decl(invariantGenericErrorElaboration.ts, 8, 1), Decl(invariantGenericErrorElaboration.ts, 13, 13))
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>Num : Symbol(Num, Decl(invariantGenericErrorElaboration.ts, 8, 1), Decl(invariantGenericErrorElaboration.ts, 13, 13))
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interface Obj<O extends { [_ in string]: Runtype<any> }> extends Runtype<{[K in keyof O]: O[K]['witness'] }> {}
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>Obj : Symbol(Obj, Decl(invariantGenericErrorElaboration.ts, 13, 22), Decl(invariantGenericErrorElaboration.ts, 15, 111))
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>O : Symbol(O, Decl(invariantGenericErrorElaboration.ts, 15, 14))
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>_ : Symbol(_, Decl(invariantGenericErrorElaboration.ts, 15, 27))
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>Runtype : Symbol(Runtype, Decl(invariantGenericErrorElaboration.ts, 3, 29))
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>Runtype : Symbol(Runtype, Decl(invariantGenericErrorElaboration.ts, 3, 29))
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>K : Symbol(K, Decl(invariantGenericErrorElaboration.ts, 15, 75))
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>O : Symbol(O, Decl(invariantGenericErrorElaboration.ts, 15, 14))
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>O : Symbol(O, Decl(invariantGenericErrorElaboration.ts, 15, 14))
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>K : Symbol(K, Decl(invariantGenericErrorElaboration.ts, 15, 75))
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declare function Obj<O extends { [_: string]: Runtype<any> }>(fields: O): Obj<O>;
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>Obj : Symbol(Obj, Decl(invariantGenericErrorElaboration.ts, 13, 22), Decl(invariantGenericErrorElaboration.ts, 15, 111))
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>O : Symbol(O, Decl(invariantGenericErrorElaboration.ts, 16, 21))
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>_ : Symbol(_, Decl(invariantGenericErrorElaboration.ts, 16, 34))
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>Runtype : Symbol(Runtype, Decl(invariantGenericErrorElaboration.ts, 3, 29))
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>fields : Symbol(fields, Decl(invariantGenericErrorElaboration.ts, 16, 62))
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>O : Symbol(O, Decl(invariantGenericErrorElaboration.ts, 16, 21))
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>Obj : Symbol(Obj, Decl(invariantGenericErrorElaboration.ts, 13, 22), Decl(invariantGenericErrorElaboration.ts, 15, 111))
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>O : Symbol(O, Decl(invariantGenericErrorElaboration.ts, 16, 21))
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interface Constraint<A extends Runtype<any>> extends Runtype<A['witness']> {
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>Constraint : Symbol(Constraint, Decl(invariantGenericErrorElaboration.ts, 16, 81))
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>A : Symbol(A, Decl(invariantGenericErrorElaboration.ts, 18, 21))
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>Runtype : Symbol(Runtype, Decl(invariantGenericErrorElaboration.ts, 3, 29))
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>Runtype : Symbol(Runtype, Decl(invariantGenericErrorElaboration.ts, 3, 29))
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>A : Symbol(A, Decl(invariantGenericErrorElaboration.ts, 18, 21))
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underlying: A,
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>underlying : Symbol(Constraint.underlying, Decl(invariantGenericErrorElaboration.ts, 18, 76))
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>A : Symbol(A, Decl(invariantGenericErrorElaboration.ts, 18, 21))
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check: (x: A['witness']) => void,
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>check : Symbol(Constraint.check, Decl(invariantGenericErrorElaboration.ts, 19, 16))
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>x : Symbol(x, Decl(invariantGenericErrorElaboration.ts, 20, 10))
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>A : Symbol(A, Decl(invariantGenericErrorElaboration.ts, 18, 21))
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}
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‎tests/baselines/reference/invariantGenericErrorElaboration.types

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=== tests/cases/compiler/invariantGenericErrorElaboration.ts ===
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// Repro from #19746
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const wat: Runtype<any> = Num;
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>wat : Runtype<any>
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>Runtype : Runtype<A>
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>Num : Num
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const Foo = Obj({ foo: Num })
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>Foo : any
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>Obj({ foo: Num }) : any
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>Obj : <O extends { [_: string]: Runtype<any>; }>(fields: O) => Obj<O>
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>{ foo: Num } : { foo: Num; }
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>foo : Num
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>Num : Num
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interface Runtype<A> {
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>Runtype : Runtype<A>
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>A : A
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constraint: Constraint<this>
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>constraint : Constraint<this>
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>Constraint : Constraint<A>
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witness: A
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>witness : A
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>A : A
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}
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interface Num extends Runtype<number> {
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>Num : Num
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>Runtype : Runtype<A>
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tag: 'number'
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>tag : "number"
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}
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declare const Num: Num
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>Num : Num
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>Num : Num
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interface Obj<O extends { [_ in string]: Runtype<any> }> extends Runtype<{[K in keyof O]: O[K]['witness'] }> {}
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>Obj : Obj<O>
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>O : O
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>_ : _
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>Runtype : Runtype<A>
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>Runtype : Runtype<A>
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>K : K
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>O : O
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>O : O
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>K : K
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declare function Obj<O extends { [_: string]: Runtype<any> }>(fields: O): Obj<O>;
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>Obj : <O extends { [_: string]: Runtype<any>; }>(fields: O) => Obj<O>
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>O : O
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>_ : string
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>Runtype : Runtype<A>
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>fields : O
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>O : O
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>Obj : Obj<O>
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>O : O
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interface Constraint<A extends Runtype<any>> extends Runtype<A['witness']> {
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>Constraint : Constraint<A>
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>A : A
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>Runtype : Runtype<A>
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>Runtype : Runtype<A>
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>A : A
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underlying: A,
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>underlying : A
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>A : A
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check: (x: A['witness']) => void,
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>check : (x: A["witness"]) => void
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>x : A["witness"]
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>A : A
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}
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‎tests/cases/compiler/invariantGenericErrorElaboration.ts

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// @strict: true
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// Repro from #19746
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const wat: Runtype<any> = Num;
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const Foo = Obj({ foo: Num })
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interface Runtype<A> {
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constraint: Constraint<this>
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witness: A
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}
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interface Num extends Runtype<number> {
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tag: 'number'
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}
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declare const Num: Num
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interface Obj<O extends { [_ in string]: Runtype<any> }> extends Runtype<{[K in keyof O]: O[K]['witness'] }> {}
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declare function Obj<O extends { [_: string]: Runtype<any> }>(fields: O): Obj<O>;
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interface Constraint<A extends Runtype<any>> extends Runtype<A['witness']> {
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underlying: A,
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check: (x: A['witness']) => void,
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}

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